How can one effectively make use of the initial load callback in angularFireCollection?

I've been working on properly synchronizing my Angular service with Firebase. To achieve this, I am utilizing angularFireCollection along with an initial load callback function. My goal is to preload additional data based on the results of the first query. However, I am facing challenges in accessing the fetched data within the callback function:

getGroupIds: function() {

var deferred = $q.defer();
var ref = new Firebase('https://<XXX>.firebaseio.com/groups');
angularFireCollection(ref, function(groups) {

    console.log(groups); 

    deferred.resolve(groups);
});

return deferred.promise;
}

Could someone provide guidance on how to access the actual data from the 'groups' object in the above example? Your help is greatly appreciated.

Answer №1

When using Firebase, a snapshot is passed into the callback function for you to extract values from:

angularFireCollection(ref, function(snapshot) {
  console.log("The name is: " + snapshot.name() + ", and its value is: " + snapshot.val());
});

Answer №2

Typically, I assign the collection to scope, but it seems that either of these methods will suffice.

var items = angularFireCollection(ref, function() {
    console.log(items);     
});

Alternatively, in a controller:

$scope.items = angularFireCollection(ref, function() {
    console.log($scope.items);     
});

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